build castles in the air

Alternative forms

 * build air castles

Etymology
The first term dates from the late 1500s. A variant, (or châteaux en Espagne), was recorded in the Roman de la Rose in the 13th century and translated into English around 1365.

Verb

 * 1)  To have any desire, idea, or plan that is unlikely to be realized; to imagine visionary projects or schemes; to have an idle fancy or a pipe dream; to daydream.

Translations

 * Breton:
 * Catalan: fer castells a l'aire
 * Czech:
 * Danish: bygge luftkasteller
 * Dutch: luchtkastelen bouwen
 * Esperanto: konstrui kastelojn en aero
 * Estonian: õhulosse ehitama
 * Finnish: rakennella pilvilinnoja
 * French:, ,
 * German: ,
 * Hebrew: בנה מגדלים באוויר
 * Hungarian: légvárakat épít
 * Italian:
 * Norwegian:
 * Bokmål: bygge luftslott
 * Nynorsk: byggje luftslott
 * Polish:
 * Portuguese: fazer castelos no ar
 * Punjabi: ਖਿਆਲੀ ਪੁਲਾਉ ਪਕਾਉਣਾ
 * Russian:
 * Serbo-Croatian:
 * Cyrillic: градити куле у зраку
 * Roman: graditi kule u zraku
 * Spanish: hacer castillos en el aire, forjar castillos en el aire, levantar castillos en el aire, hacer castillos de naipes
 * Swedish: